THE STABILITY OF THE LOW ALLOY STEELS IN ORGANIC SYSTEMS WITH SUCCINIC AND ADIPIC ACIDS

Abstract

The behaviour of three type of steel, with a variable carbon concentration (from 0.20 to 0.40%) is studied in medium of methanol – 10% ethylene glycol – 5% succinic or adipic acids with water concentration varying between 1% to 5%. The weight losses are measured; also the polarisation curves are plotted and the corrosion parameters are established. SEM visualised the metallic surface. The corrosion compounds are analysed by IR spectroscopy, X-ray diffraction and chemical analysis.